[SOLVED] Right way to delete unused docker images on OpenShift Origin

Right way to delete unused docker images on OpenShift Origin

I try to delete unused docker images on OpenShift origin. What is the right way to do this?

I tried:

docker rmi `docker images -aq`

This deleted all the unused images but I got something like this:

<none>                                           <none>              28e03c727eab        10 days ago         583.5 MB
172.30.xx.xx:5000/dev-mule/mule             <none>              d059900ab541        4 weeks ago         985.9 MB
172.30.xx.xx:5000/test-dev-mule/test-mule   <none>              d059900ab541        4 weeks ago         985.9 MB
<none>                                           <none>              80ccbf3e9509        8 weeks ago         415.8 MB
<none>                                           <none>              d2d658a63eb2        8 weeks ago         1.59 MB
<none>                                           <none>              eda6efd4df85        10 weeks ago        430 MB
<none>                                           <none>              2f0fc5db512e        10 weeks ago        711.6 MB

I have 7 running containers so this seems fine. The used images are still here.

But when I perform oc get images I got a very big list of very much images in this style:

sha256:830ed5ad3c2deab31836b1d65877c048107d0f6788daa4a36d158386000050a2   172.30.xx.xx:5000/dev-proj/proj@sha256:830ed5ad3c2deab31836b1d65877c048107d0f6788daa4a36d158386000050a2

What is the right way to delete unused images in OpenShift Origin? I'm on version oc v1.1.6

Solution

You should use the oc adm prune images command to remove unused images. Note that this will be conservative and not delete images that have recently been changed.

See https://docs.openshift.org/latest/admin_guide/pruning_resources.html for more.